<%@ taglib prefix="s" uri="/struts-tags" %>
<!DOCTYPE html>
<html>
  <head>
	<meta charset="utf-8">
    <title>tree</title>
	<script src="../js/d3.v3.min.js"></script>

  <link rel="stylesheet" href="../tree/css/d3.tree.css" type="text/css"></link>
 
<style>
#chartPanel {
	float: left; 
}
#controlPanel { 
	position: absolute;
	right: 10px;
	top: 10px;
	width: 100px;
}
.legend {
	font-size: 20px;
} 
</style>
  <s:head/>
  </head>

  <body>
  
  <div id="chartPanel"></div>
  <div id="controlPanel">
  	
  	<form action="<s:url action="fileUpload" namespace="/tree"/>" method="post" enctype="multipart/form-data">
  		<input type="hidden" name="destPage" value="<%= request.getServletPath()%>" />
  		<div>
  			<label for="dataFile">data file</label>
  			<s:file name="data" />
  		</div>
  		<div>
  			<input type="submit"/>
  		</div>
  	</form>
  </div>
  
<script>

var m = [20, 120, 20, 120],
w = 1280 - m[1] - m[3],
h = 800 - m[0] - m[2],
i = 0,
root;

var tree = d3.layout.tree()
.size([h, w]);

var diagonal = d3.svg.diagonal()
.projection(function(d) { return [d.y, d.x]; });

var vis = d3.select("#chartPanel").append("svg:svg")
.attr("width", w + m[1] + m[3])
.attr("height", h + m[0] + m[2])
.append("svg:g")
.attr("transform", "translate(" + m[3] + "," + m[0] + ")");

d3.json('<s:property value="#session['CURRENT_FILE']"/>', function(json) {
root = json;
root.x0 = h / 2;
root.y0 = 0;

function toggleAll(d) {
if (d.children) {
  d.children.forEach(toggleAll);
  toggle(d);
}
}

// Initialize the display to show a few nodes.
root.children.forEach(toggleAll);


update(root);
});

function update(source) {
var duration = d3.event && d3.event.altKey ? 5000 : 500;

// Compute the new tree layout.
var nodes = tree.nodes(root).reverse();

// Normalize for fixed-depth.
nodes.forEach(function(d) { d.y = d.depth * 180; });

// Update the nodes…
var node = vis.selectAll("g.node")
  .data(nodes, function(d) { return d.id || (d.id = ++i); });

// Enter any new nodes at the parent's previous position.
var nodeEnter = node.enter().append("svg:g")
  .attr("class", "node")
  .attr("transform", function(d) { return "translate(" + source.y0 + "," + source.x0 + ")"; })
  .on("click", function(d) { toggle(d); update(d); });

nodeEnter.append("svg:circle")
  .attr("r", 1e-6)
  .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

nodeEnter.append("svg:text")
  .attr("x", function(d) { return d.children || d._children ? -10 : 10; })
  .attr("dy", ".35em")
  .attr("text-anchor", function(d) { return d.children || d._children ? "end" : "start"; })
  .text(function(d) { return d.name; })
  .style("fill-opacity", 1e-6);

// Transition nodes to their new position.
var nodeUpdate = node.transition()
  .duration(duration)
  .attr("transform", function(d) { return "translate(" + d.y + "," + d.x + ")"; });

nodeUpdate.select("circle")
  .attr("r", 4.5)
  .style("fill", function(d) { return d._children ? "lightsteelblue" : "#fff"; });

nodeUpdate.select("text")
  .style("fill-opacity", 1);

// Transition exiting nodes to the parent's new position.
var nodeExit = node.exit().transition()
  .duration(duration)
  .attr("transform", function(d) { return "translate(" + source.y + "," + source.x + ")"; })
  .remove();

nodeExit.select("circle")
  .attr("r", 1e-6);

nodeExit.select("text")
  .style("fill-opacity", 1e-6);

// Update the links…
var link = vis.selectAll("path.link")
  .data(tree.links(nodes), function(d) { return d.target.id; });

// Enter any new links at the parent's previous position.
link.enter().insert("svg:path", "g")
  .attr("class", "link")
  .attr("d", function(d) {
    var o = {x: source.x0, y: source.y0};
    return diagonal({source: o, target: o});
  })
.transition()
  .duration(duration)
  .attr("d", diagonal);

// Transition links to their new position.
link.transition()
  .duration(duration)
  .attr("d", diagonal);

// Transition exiting nodes to the parent's new position.
link.exit().transition()
  .duration(duration)
  .attr("d", function(d) {
    var o = {x: source.x, y: source.y};
    return diagonal({source: o, target: o});
  })
  .remove();

// Stash the old positions for transition.
nodes.forEach(function(d) {
d.x0 = d.x;
d.y0 = d.y;
});
}

//Toggle children.
function toggle(d) {
if (d.children) {
d._children = d.children;
d.children = null;
} else {
d.children = d._children;
d._children = null;
}
}

</script>
  
  
  </body>
</html>



















